Are you thinking of Augeas? That was a project inside RH to parse nearly every config found in /etc, and be able to view and modify them all from a standard API.
https://augeas.net/news.html 1.12.0 - 2019-04-13
I looked a little harder and then found jc[1] which made parsing the ini file easy, and since I didn't need full CRUD support I threw my hands up and used that instead. I _would_ like to find a fast and easy way to convert json/yaml to simple INI file syntax at the command line, or do idempotent modifications to the INI files without writing a command where 99% of it is describing to jq or awk what an INI file looks like.